<span style="font-size: 9pt; font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体; mso-bidi-font-weight: bold;" lang="EN-US">The entropies of structure, information and the effectiveness entropy between knowledge and organization structure are main entropy sources of supply chain network. Entropy model of fractal supply chain network organization structure is established. Moreover, the basic principle and process of fuzzy AHP are introduced. Fractal knowledge management network outside independently organization structure is set up based on fuzzy AHP. Knowledge and organization structure have the whole similarity, and its entropy model is established. Finally, the entropies of structure, information and the effectiveness entropy are summed to research. And the model shows that fractal structure has prominent effect of dropping entropy.</span>